gistfile1.txt

using UnityEngine;
using System.Collections;
using UnityEngine.UI;

public class EnemyHealth : MonoBehaviour {
	
	public float hitPoints = 100f;//max health
	public float currentHitPoints;//current health
	public GameObject destroyFX;
    public Image healthbar;

    public Color32 startColor;
    public Color32 middleColor;
    public Color32 endColor;

    void Start () {
		currentHitPoints = hitPoints;//starting health, which is max health
        setHealth();
	}
	
	void TakeDamage(float amt) { //amount of health
		currentHitPoints -= amt;


        setHealth();

        if (currentHitPoints <=0) {
			currentHitPoints = 0;
			Die();
		}

    }
	
	void Die() {
		if(gameObject.tag == "Enemy") {
			//Instantiate(destroyFX, this.transform.position, this.transform.rotation);
			Destroy (gameObject);
			//Debug.Log ("Enemy Object Has died");
		}
	}

    public void setHealth() {
        //this will decrease the healthbar when taking damage
        float enemyHealthCalc = currentHitPoints / hitPoints; //if currentHitPoints 80 / 100 = 0.8f

        //enemyHealth valve 0-1, <- health goes from 0=0% to 1=100%?
        healthbar.transform.localScale = new Vector3(enemyHealthCalc, healthbar.transform.localScale.y, healthbar.transform.localScale.z);

        if (enemyHealthCalc < 0.1f) {
            healthbar.color = Color.Lerp(endColor, middleColor, enemyHealthCalc * 2);
            //Debug.Log("color code 'if' is running");
        }
        else {
            healthbar.color = Color.Lerp(middleColor, startColor, (enemyHealthCalc - 0.5f) * 2);
            //Debug.Log("color code 'else' is running");
        }
        
    }

}